Much of the history of the 509th PIB has to be pieced together by the use of veteran narratives and some work by a few "history detectives".

Diego Cancelli owns and operates Il Casale di Giulia a working farm, & B & B. This was the 509th Command Post during the battle of Anzio...

A summary history of the 509th Parachute Infantry Regiment - the first to jump into combat.

The Boldest Plan is the Best - The combat history of the 509th Parachute Infantry Battalion during WWII

History of the 503rd Parachute Infantry Regiment